sheet.addRule("table.inner {width: 100%; height: 100%; background-color: #F2F2F2; border-width: 1px; border-style: solid; border-color: #666666;}");

sheet.addRule("table.outer {width: 100%; height: 100%; border-width: 1px; border-style: solid; border-color: #666666;}");

sheet.addRule("div {padding:5; height: 100%;}");

=========   =========
|a      |   |a      |
|a      |   |a      |
|a      |   |a      |
|a      |   =========
=========
=========   =========
| .     |   |.      |
| .     |   |.      |

=========   =========
|a      |   |a      |
|a      |   |a      |
|a      |   |a      |
|a      |   |       |
=========   =========
=========   =========
| .     |   |.      |
| .     |   |.      |